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How to get the current geographical location through WeChat and save it in the session

一個新手

Sep 14, 2017 am 09:04 AM

geographical location Obtain

First, add the WeChat configuration file to the static page and obtain it through js.

<script type="text/javascript">
　　wx.config({
　　　　debug: false,
　　　　appId: &#39;{$signPackage.appId}&#39;,
　　　　timestamp: &#39;{$signPackage.timestamp}&#39;,
　　　　nonceStr: &#39;{$signPackage.nonceStr}&#39;,
　　　　signature: &#39;{$signPackage.signature}&#39;,
　　　　jsApiList: [
　　　　　　// 所有要調(diào)用的 API 都要加到這個列表中
　　　　　　&#39;checkJsApi&#39;,
　　　　　　&#39;openLocation&#39;,
　　　　　　 &#39;getLocation&#39;,
　　　　　　 &#39;scanQRCode&#39;
　　　　]
　　});
　　wx.ready(function () {
　　　　$(&#39;#scan&#39;).click(function(){
　　　　　　wx.scanQRCode({
　　　　　　　　needResult: 0,
　　　　　    });
　　　    });
　　　　wx.checkJsApi({
　　　　　　 jsApiList: [
　　　　　　　　 &#39;getLocation&#39;
　　　　　　],
　　　　　　success: function (res) {
　　　　　　　　if (res.checkResult.getLocation == false)
　　　　　　　　{
　　　　　　　　　　alert(&#39;你的微信版本太低，不支持微信JS接口，請升級到最新的微信版本！&#39;);
　　　　　　　　　　 return;
　　　　　　　　}
　　　　　　}
　　　　});
　　　　wx.getLocation({
　　　　　　success: function (res) {
　　　　　   　　 var latitude = res.latitude; // 緯度，浮點數(shù)，范圍為90 ~ -90
　　　　　　　　var longitude = res.longitude; // 經(jīng)度，浮點數(shù)，范圍為180 ~ -180。
　　　　　　　　var geoconv = &#39;http://api.map.baidu.com/geoconv/v1/?callback=coordinateTransformation&coords=&#39; + longitude + &#39;,&#39; + latitude + &#39;&from=1&to=5&ak=5BFNbSgnVF5g2O72NpvTDxFm&#39;;
　　　　　　　　var script = document.createElement(&#39;script&#39;);
　　　　　　　　script.src = geoconv;
　　　　　　　　document.head.appendChild(script);
　　　　　　 },
　　　　　　cancel: function (res) {
　　　　　　　　alert(&#39;用戶拒絕授權(quán)獲取地理位置&#39;);
　　　　　    }
　　　　 });
　　});
　　function coordinateTransformation(data)
　　{
　　　　var LATLNG = data.result[0].y + &#39;,&#39; + data.result[0].x;
　　　　var url = &#39;http://api.map.baidu.com/geocoder/v2/?callback=getCurrentLocation&ak=5BFNbSgnVF5g2O72NpvTDxFm&location=&#39; + LATLNG + &#39;&output=json&pois=1&#39;;
　　　　var script = document.createElement(&#39;script&#39;);
　　　　script.src = url;
　　　　document.head.appendChild(script);
　　 }
　　function getCurrentLocation(data)
　　{
　　　　if(data.status === 0)
　　　　 {
　　　　　　var address = data.result.formatted_address,
　　　　　　x = data.result.location.lng,
　　　　　    y = data.result.location.lat,
　　　　　　city = data.result.addressComponent.city,
　　　　　　street = data.result.addressComponent.street || data.result.formatted_address,
　　　　　　reqData = &#39;street=&#39; + address + &#39;&name=&#39; + street + &#39;&lng=&#39; + x + &#39;&lat=&#39; + y + &#39;&city=&#39; + city;
　　　　　　var url = "{:U(&#39;Index/savePosition&#39;)}";
　　　　　　 $.getJSON(url,{&#39;name&#39;:street,&#39;lng&#39;:x,&#39;lat&#39;: y,&#39;city&#39;:city},function(data)
　　　　　　 {
　　　　　　　　 if(data.returnCode) { }
　　　　　　});
　　　　 }
　　 }
</script>
其次，在控制器中接收ajax傳遞的地理坐標(biāo)，然后保存到session中。
public function savePosition()    {    　　
$city   = II(&#39;get.city&#39;,&#39;&#39;,&#39;trim&#39;);    　　
$addr = II(&#39;get.name&#39;,&#39;&#39;,&#39;trim&#39;);    　　
$lng   = II(&#39;get.lng&#39;,&#39;&#39;,&#39;trim&#39;);    　　
$lat    = II(&#39;get.lat&#39;,&#39;&#39;,&#39;trim&#39;);    　　
$myLocation = array(            　　　　
    &#39;city&#39;   =>$city,            　　　　
    &#39;addr&#39; =>$addr,            　　　　
    &#39;lng&#39;   =>$lng,            　　　
    &#39;lat&#39;   =>$lat,    　　);
　　$_SESSION[&#39;MyLocation&#39;] = $myLocation;
        　　$data[&#39;returnCode&#39;]  = 1;        　　
        　　$data[&#39;returnInfo&#39;]  = &#39;獲取位置成功！&#39;;        　　
        　　$this->ajaxReturn($data);        　
        　　　return;    
        　　　}

Note: The thinkphp framework is used. II is a custom method to obtain the value passed by get or post, the same as the I function.

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